help please

[Steven Bethard]

gargonx wrote:
> Well that seems to work like a champion, but my prob then would be; how
> do i get the double character values of ext to turn back to the single
> character keys. The reversed (decode if you will).

It's unclear what you want to do here.  If you have say:

ext = dict(aa='A', ab='B', bb='C')

then how should 'aaabb' be decoded?  Some possibilities:

'ABb'
'AaC'
'aAC'

Steve